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Summary: XML Attrs | Inherited XML Attrs | Inherited Constants | Ctors | Methods | Protected Methods | Inherited Methods

# PreferenceGroup

`public abstract class PreferenceGroup`
`` `extends Preference` ``

java.lang.Object
↳ | android.preference.Preference
| ↳ | android.preference.PreferenceGroup

Known direct subclasses PreferenceCategory, PreferenceScreen
PreferenceCategory | This class is deprecated. Use the AndroidX Preference Library for consistent behavior across all devices. For more information on using the AndroidX Preference Library see Settings.
PreferenceScreen | This class is deprecated. Use the AndroidX Preference Library for consistent behavior across all devices. For more information on using the AndroidX Preference Library see Settings.

This class is deprecated.
Use the AndroidX Preference Library for consistent behavior across all devices. For more information on using the AndroidX Preference Library see Settings.

A container for multiple `Preference` objects. It is a base class for Preference objects that are parents, such as `PreferenceCategory` and `PreferenceScreen`.

### Developer Guides

For information about building a settings UI with Preferences, read the Settings guide.

## Summary

### XML attributes
`android:orderingFromXml` | Whether to order the Preference under this group as they appear in the XML file.

### Inherited XML attributes
From class `android.preference.Preference`
`android:defaultValue` | The default value for the preference, which will be set either if persistence is off or persistence is on and the preference is not found in the persistent storage.
`android:dependency` | The key of another Preference that this Preference will depend on.
`android:enabled` | Whether the Preference is enabled.
`android:fragment` | When used inside of a modern PreferenceActivity, this declares a new PreferenceFragment to be shown when the user selects this item.
`android:icon` | The optional icon for the preference.
`android:iconSpaceReserved` | Whether the space for the preference icon view will be reserved.
`android:key` | The key to store the Preference value.
`android:layout` | The layout for the Preference in a PreferenceActivity screen.
`android:order` | The order for the Preference (lower values are to be ordered first).
`android:persistent` | Whether the Preference stores its value to the storage.
`android:recycleEnabled` | Whether the preference has enabled to have its view recycled when used in the list view.
`android:selectable` | Whether the Preference is selectable.
`android:shouldDisableView` | Whether the view of this Preference should be disabled when this Preference is disabled.
`android:singleLineTitle` | Whether to use single line for the preference title text.
`android:summary` | The summary for the Preference.
`android:title` | The title for the Preference.
`android:widgetLayout` | The layout for the controllable widget portion of a Preference.

### Inherited constants
From class `android.preference.Preference`
`int` | `DEFAULT_ORDER` Specify for `setOrder(int)` if a specific order is not required.

### Public constructors
`PreferenceGroup(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)`
`PreferenceGroup(Context context, AttributeSet attrs, int defStyleAttr)`
`PreferenceGroup(Context context, AttributeSet attrs)`

### Public methods
`void` | `addItemFromInflater(Preference preference)` Called by the inflater to add an item to this group.
`boolean` | `addPreference(Preference preference)` Adds a `Preference` at the correct position based on the preference's order.
`Preference` | `findPreference(CharSequence key)` Finds a `Preference` based on its key.
`Preference` | `getPreference(int index)` Returns the `Preference` at a particular index.
`int` | `getPreferenceCount()` Returns the number of children `Preference`s.
`boolean` | `isOrderingAsAdded()` Whether this group is ordering preferences in the order they are added.
`void` | `notifyDependencyChange(boolean disableDependents)` Notifies any listening dependents of a change that affects the dependency.
`void` | `removeAll()` Removes all `Preference` from this group.
`boolean` | `removePreference(Preference preference)` Removes a `Preference` from this group.
`void` | `setOrderingAsAdded(boolean orderingAsAdded)` Whether to order the `Preference` children of this group as they are added.

### Protected methods
`void` | `dispatchRestoreInstanceState(Bundle container)`
`void` | `dispatchSaveInstanceState(Bundle container)`
`boolean` | `isOnSameScreenAsChildren()` Whether this preference group should be shown on the same screen as its contained preferences.
`void` | `onAttachedToActivity()` Called when the Preference hierarchy has been attached to the `PreferenceActivity`.
`boolean` | `onPrepareAddPreference(Preference preference)` Prepares a `Preference` to be added to the group.
`void` | `onPrepareForRemoval()` Called when this Preference is being removed from the hierarchy.

### Inherited methods
From class `android.preference.Preference`
`boolean` | `callChangeListener(Object newValue)` Call this method after the user changes the preference, but before the internal state is set.
`int` | `compareTo(Preference another)` Compares Preference objects based on order (if set), otherwise alphabetically on the titles.
`Preference` | `findPreferenceInHierarchy(String key)` Finds a Preference in this hierarchy (the whole thing, even above/below your `PreferenceScreen` screen break) with the given key.
`Context` | `getContext()` Returns the `Context` of this Preference.
`String` | `getDependency()` Returns the key of the dependency on this Preference.
`SharedPreferences.Editor` | `getEditor()` Returns an `SharedPreferences.Editor` where this Preference can save its value(s).
`Bundle` | `getExtras()` Return the extras Bundle object associated with this preference, creating a new Bundle if there currently isn't one.
`String` | `getFragment()` Return the fragment class name associated with this Preference.
`Drawable` | `getIcon()` Returns the icon of this Preference.
`Intent` | `getIntent()` Return the `Intent` associated with this Preference.
`String` | `getKey()` Gets the key for this Preference, which is also the key used for storing values into `SharedPreferences` or `PreferenceDataStore`.
`int` | `getLayoutResource()` Gets the layout resource that will be shown as the `View` for this Preference.
`Preference.OnPreferenceChangeListener` | `getOnPreferenceChangeListener()` Returns the callback to be invoked when this Preference is changed by the user (but before the internal state has been updated).
`Preference.OnPreferenceClickListener` | `getOnPreferenceClickListener()` Returns the callback to be invoked when this Preference is clicked.
`int` | `getOrder()` Gets the order of this Preference with respect to other Preference objects on the same level.
`PreferenceGroup` | `getParent()` Returns the `PreferenceGroup` which is this Preference assigned to or `null` if this preference is not assigned to any group or is a root Preference.
`boolean` | `getPersistedBoolean(boolean defaultReturnValue)` Attempts to get a persisted boolean if this Preference is persistent.
`float` | `getPersistedFloat(float defaultReturnValue)` Attempts to get a persisted float if this Preference is persistent.
`int` | `getPersistedInt(int defaultReturnValue)` Attempts to get a persisted int if this Preference is persistent.
`long` | `getPersistedLong(long defaultReturnValue)` Attempts to get a persisted long if this Preference is persistent.
`String` | `getPersistedString(String defaultReturnValue)` Attempts to get a persisted String if this Preference is persistent.
`Set<String>` | `getPersistedStringSet(Set<String> defaultReturnValue)` Attempts to get a persisted set of Strings if this Preference is persistent.
`PreferenceDataStore` | `getPreferenceDataStore()` Returns `PreferenceDataStore` used by this Preference.
`PreferenceManager` | `getPreferenceManager()` Gets the `PreferenceManager` that manages this Preference object's tree.
`SharedPreferences` | `getSharedPreferences()` Returns the `SharedPreferences` where this Preference can read its value(s).
`boolean` | `getShouldDisableView()` Checks whether this Preference should disable its view when it's action is disabled.
`CharSequence` | `getSummary()` Returns the summary of this Preference.
`CharSequence` | `getTitle()` Returns the title of this Preference.
`int` | `getTitleRes()` Returns the title resource ID of this Preference.
`View` | `getView(View convertView, ViewGroup parent)` Gets the View that will be shown in the `PreferenceActivity`.
`int` | `getWidgetLayoutResource()` Gets the layout resource for the controllable widget portion of this Preference.
`boolean` | `hasKey()` Checks whether this Preference has a valid key.
`boolean` | `isEnabled()` Checks whether this Preference should be enabled in the list.
`boolean` | `isIconSpaceReserved()` Gets whether the space this preference icon view is reserved.
`boolean` | `isPersistent()` Checks whether this Preference is persistent.
`boolean` | `isRecycleEnabled()` Checks whether this Preference has enabled to have its view recycled when used in the list view.
`boolean` | `isSelectable()` Checks whether this Preference should be selectable in the list.
`boolean` | `isSingleLineTitle()` Gets whether the title of this preference is constrained to a single line.
`void` | `notifyChanged()` Should be called when the data of this `Preference` has changed.
`void` | `notifyDependencyChange(boolean disableDependents)` Notifies any listening dependents of a change that affects the dependency.
`void` | `notifyHierarchyChanged()` Should be called when a Preference has been added/removed from this group, or the ordering should be re-evaluated.
`void` | `onAttachedToActivity()` Called when the Preference hierarchy has been attached to the `PreferenceActivity`.
`void` | `onAttachedToHierarchy(PreferenceManager preferenceManager)` Called when this Preference has been attached to a Preference hierarchy.
`void` | `onBindView(View view)` Binds the created View to the data for this Preference.
`void` | `onClick()` Processes a click on the preference.
`View` | `onCreateView(ViewGroup parent)` Creates the View to be shown for this Preference in the `PreferenceActivity`.
`void` | `onDependencyChanged(Preference dependency, boolean disableDependent)` Called when the dependency changes.
`Object` | `onGetDefaultValue(TypedArray a, int index)` Called when a Preference is being inflated and the default value attribute needs to be read.
`void` | `onParentChanged(Preference parent, boolean disableChild)` Called when the implicit parent dependency changes.
`void` | `onPrepareForRemoval()` Called when this Preference is being removed from the hierarchy.
`void` | `onRestoreInstanceState(Parcelable state)` Hook allowing a Preference to re-apply a representation of its internal state that had previously been generated by `onSaveInstanceState()`.
`Parcelable` | `onSaveInstanceState()` Hook allowing a Preference to generate a representation of its internal state that can later be used to create a new instance with that same state.
`void` | `onSetInitialValue(boolean restorePersistedValue, Object defaultValue)` Implement this to set the initial value of the Preference.
`Bundle` | `peekExtras()` Return the extras Bundle object associated with this preference, returning `null` if there is not currently one.
`boolean` | `persistBoolean(boolean value)` Attempts to persist a boolean if this Preference is persistent.
`boolean` | `persistFloat(float value)` Attempts to persist a long if this Preference is persistent.
`boolean` | `persistInt(int value)` Attempts to persist an int if this Preference is persistent.
`boolean` | `persistLong(long value)` Attempts to persist a long if this Preference is persistent.
`boolean` | `persistString(String value)` Attempts to persist a String if this Preference is persistent.
`boolean` | `persistStringSet(Set<String> values)` Attempts to persist a set of Strings if this Preference is persistent.
`void` | `restoreHierarchyState(Bundle container)` Restore this Preference hierarchy's previously saved state from the given container.
`void` | `saveHierarchyState(Bundle container)` Store this Preference hierarchy's frozen state into the given container.
`void` | `setDefaultValue(Object defaultValue)` Sets the default value for this Preference, which will be set either if persistence is off or persistence is on and the preference is not found in the persistent storage.
`void` | `setDependency(String dependencyKey)` Sets the key of a Preference that this Preference will depend on.
`void` | `setEnabled(boolean enabled)` Sets whether this Preference is enabled.
`void` | `setFragment(String fragment)` Sets the class name of a fragment to be shown when this Preference is clicked.
`void` | `setIcon(Drawable icon)` Sets the icon for this Preference with a Drawable.
`void` | `setIcon(int iconResId)` Sets the icon for this Preference with a resource ID.
`void` | `setIconSpaceReserved(boolean iconSpaceReserved)` Sets whether to reserve the space of this Preference icon view when no icon is provided.
`void` | `setIntent(Intent intent)` Sets an `Intent` to be used for `Context#startActivity(Intent)` when this Preference is clicked.
`void` | `setKey(String key)` Sets the key for this Preference, which is used as a key to the `SharedPreferences` or `PreferenceDataStore`.
`void` | `setLayoutResource(int layoutResId)` Sets the layout resource that is inflated as the `View` to be shown for this Preference.
`void` | `setOnPreferenceChangeListener(Preference.OnPreferenceChangeListener onPreferenceChangeListener)` Sets the callback to be invoked when this Preference is changed by the user (but before the internal state has been updated).
`void` | `setOnPreferenceClickListener(Preference.OnPreferenceClickListener onPreferenceClickListener)` Sets the callback to be invoked when this Preference is clicked.
`void` | `setOrder(int order)` Sets the order of this Preference with respect to other Preference objects on the same level.
`void` | `setPersistent(boolean persistent)` Sets whether this Preference is persistent.
`void` | `setPreferenceDataStore(PreferenceDataStore dataStore)` Sets a `PreferenceDataStore` to be used by this Preference instead of using `SharedPreferences`.
`void` | `setRecycleEnabled(boolean enabled)` Sets whether this Preference has enabled to have its view recycled when used in the list view.
`void` | `setSelectable(boolean selectable)` Sets whether this Preference is selectable.
`void` | `setShouldDisableView(boolean shouldDisableView)` Sets whether this Preference should disable its view when it gets disabled.
`void` | `setSingleLineTitle(boolean singleLineTitle)` Sets whether to constrain the title of this Preference to a single line instead of letting it wrap onto multiple lines.
`void` | `setSummary(CharSequence summary)` Sets the summary for this Preference with a CharSequence.
`void` | `setSummary(int summaryResId)` Sets the summary for this Preference with a resource ID.
`void` | `setTitle(CharSequence title)` Sets the title for this Preference with a CharSequence.
`void` | `setTitle(int titleResId)` Sets the title for this Preference with a resource ID.
`void` | `setWidgetLayoutResource(int widgetLayoutResId)` Sets the layout for the controllable widget portion of this Preference.
`boolean` | `shouldCommit()` Returns whether the `Preference` should commit its saved value(s) in `getEditor()`.
`boolean` | `shouldDisableDependents()` Checks whether this preference's dependents should currently be disabled.
`boolean` | `shouldPersist()` Checks whether, at the given time this method is called, this Preference should store/restore its value(s) into the `SharedPreferences` or into `PreferenceDataStore` if assigned.
`String` | `toString()` Returns a string representation of the object.
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
From interface `java.lang.Comparable`
`abstract int` | `compareTo(Preference o)` Compares this object with the specified object for order.

## XML attributes

### android:orderingFromXml

Whether to order the Preference under this group as they appear in the XML file. If this is false, the ordering will follow the Preference order attribute and default to alphabetic for those without the order attribute.

May be a boolean value, such as "`true`" or "`false`".

## Public constructors

### PreferenceGroup

    public PreferenceGroup (Context context,
                    AttributeSet attrs,
                    int defStyleAttr,
                    int defStyleRes)

Parameters
`context` | `Context`
`attrs` | `AttributeSet`
`defStyleAttr` | `int`
`defStyleRes` | `int`

### PreferenceGroup

    public PreferenceGroup (Context context,
                    AttributeSet attrs,
                    int defStyleAttr)

Parameters
`context` | `Context`
`attrs` | `AttributeSet`
`defStyleAttr` | `int`

### PreferenceGroup

    public PreferenceGroup (Context context,
                    AttributeSet attrs)

Parameters
`context` | `Context`
`attrs` | `AttributeSet`

## Public methods

### addItemFromInflater

    public void addItemFromInflater (Preference preference)

Called by the inflater to add an item to this group.

Parameters
`preference` | `Preference`

### addPreference

    public boolean addPreference (Preference preference)

Adds a `Preference` at the correct position based on the preference's order.

Parameters
`preference` | `Preference`: The preference to add.

Returns
`boolean` | Whether the preference is now in this group.

### findPreference

    public Preference findPreference (CharSequence key)

Finds a `Preference` based on its key. If two `Preference` share the same key (not recommended), the first to appear will be returned (to retrieve the other preference with the same key, call this method on the first preference). If this preference has the key, it will not be returned.

This will recursively search for the preference into children that are also `PreferenceGroup`.

Parameters
`key` | `CharSequence`: The key of the preference to retrieve.

Returns
`Preference` | The `Preference` with the key, or null.

### getPreference

    public Preference getPreference (int index)

Returns the `Preference` at a particular index.

Parameters
`index` | `int`: The index of the `Preference` to retrieve.

Returns
`Preference` | The `Preference`.

### getPreferenceCount

    public int getPreferenceCount ()

Returns the number of children `Preference`s.

Returns
`int` | The number of preference children in this group.

### isOrderingAsAdded

    public boolean isOrderingAsAdded ()

Whether this group is ordering preferences in the order they are added.

Returns
`boolean` | Whether this group orders based on the order the children are added.

See also:

- `setOrderingAsAdded(boolean)`

### notifyDependencyChange

    public void notifyDependencyChange (boolean disableDependents)

Notifies any listening dependents of a change that affects the dependency.

Parameters
`disableDependents` | `boolean`: Whether this Preference should disable its dependents.

### removeAll

    public void removeAll ()

Removes all `Preference` from this group.

### removePreference

    public boolean removePreference (Preference preference)

Removes a `Preference` from this group.

Parameters
`preference` | `Preference`: The preference to remove.

Returns
`boolean` | Whether the preference was found and removed.

### setOrderingAsAdded

    public void setOrderingAsAdded (boolean orderingAsAdded)

Whether to order the `Preference` children of this group as they are added. If this is false, the ordering will follow each Preference order and default to alphabetic for those without an order.

If this is called after preferences are added, they will not be re-ordered in the order they were added, hence call this method early on.

Parameters
`orderingAsAdded` | `boolean`: Whether to order according to the order added.

See also:

- `Preference.setOrder(int)`

## Protected methods

### dispatchRestoreInstanceState

    protected void dispatchRestoreInstanceState (Bundle container)

Parameters
`container` | `Bundle`

### dispatchSaveInstanceState

    protected void dispatchSaveInstanceState (Bundle container)

Parameters
`container` | `Bundle`

### isOnSameScreenAsChildren

    protected boolean isOnSameScreenAsChildren ()

Whether this preference group should be shown on the same screen as its contained preferences.

Returns
`boolean` | True if the contained preferences should be shown on the same screen as this preference.

### onAttachedToActivity

    protected void onAttachedToActivity ()

Called when the Preference hierarchy has been attached to the `PreferenceActivity`. This can also be called when this Preference has been attached to a group that was already attached to the `PreferenceActivity`.

### onPrepareAddPreference

    protected boolean onPrepareAddPreference (Preference preference)

Prepares a `Preference` to be added to the group.

Parameters
`preference` | `Preference`: The preference to add.

Returns
`boolean` | Whether to allow adding the preference (true), or not (false).

### onPrepareForRemoval

    protected void onPrepareForRemoval ()

Called when this Preference is being removed from the hierarchy. You should remove any references to this Preference that you know about. Make sure to call through to the superclass implementation.
If you override this method you must call through to the superclass implementation.

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